An Artificial Magnetic Conductor Backed Electrically Large Zero-Phase-Shift Line Grid-Loop Near-Field Antenna

Yunjia Zeng; Zhi Ning Chen; Xianming Qing; Jian Ming Jin

doi:10.1109/TAP.2017.2670323

An Artificial Magnetic Conductor Backed Electrically Large Zero-Phase-Shift Line Grid-Loop Near-Field Antenna

Yunjia Zeng, Zhi Ning Chen, Xianming Qing, Jian Ming Jin

Research output: Contribution to journal › Article › peer-review

Abstract

A zero-phase-shift line (ZPSL) grid-loop antenna backed by an artificial magnetic conductor (AMC) is proposed to realize a uniform and strong magnetic field distribution over an electrically large interrogation zone for near-field wireless systems. The grid-loop configuration is able to achieve a uniform magnetic field distribution over an enlarged interrogation zone by enhancing the magnetic field in the central portion of the ZPSL loop. Moreover, an AMC comprised of four-arm spiral unit cells is designed to back the ZPSL grid-loop antenna for a directional field distribution and enhanced magnetic field intensity. The proposed antenna is exemplified as a reader antenna for ultrahigh frequency near-field radio frequency identification systems. By using an Impinj Speedway reader with an output power of 30 dBm, a 100% detection rate of Impinj J41 tags is achieved up to 90 mm over an interrogation zone of 200 × 200 mm².

Original language	English (US)
Article number	7857755
Pages (from-to)	1599-1606
Number of pages	8
Journal	IEEE Transactions on Antennas and Propagation
Volume	65
Issue number	4
DOIs	https://doi.org/10.1109/TAP.2017.2670323
State	Published - Apr 2017

Keywords

Artificial magnetic conductor (AMC)
grid loop
loop antenna
near-field antenna
radio frequency identification (RFID)
ultrahigh frequency (UHF)
zero-phase-shift line (ZPSL)

ASJC Scopus subject areas

Electrical and Electronic Engineering

Online availability

10.1109/TAP.2017.2670323

Library availability

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title = "An Artificial Magnetic Conductor Backed Electrically Large Zero-Phase-Shift Line Grid-Loop Near-Field Antenna",

abstract = "A zero-phase-shift line (ZPSL) grid-loop antenna backed by an artificial magnetic conductor (AMC) is proposed to realize a uniform and strong magnetic field distribution over an electrically large interrogation zone for near-field wireless systems. The grid-loop configuration is able to achieve a uniform magnetic field distribution over an enlarged interrogation zone by enhancing the magnetic field in the central portion of the ZPSL loop. Moreover, an AMC comprised of four-arm spiral unit cells is designed to back the ZPSL grid-loop antenna for a directional field distribution and enhanced magnetic field intensity. The proposed antenna is exemplified as a reader antenna for ultrahigh frequency near-field radio frequency identification systems. By using an Impinj Speedway reader with an output power of 30 dBm, a 100% detection rate of Impinj J41 tags is achieved up to 90 mm over an interrogation zone of 200 × 200 mm2.",

keywords = "Artificial magnetic conductor (AMC), grid loop, loop antenna, near-field antenna, radio frequency identification (RFID), ultrahigh frequency (UHF), zero-phase-shift line (ZPSL)",

author = "Yunjia Zeng and Chen, {Zhi Ning} and Xianming Qing and Jin, {Jian Ming}",

note = "Publisher Copyright: {\textcopyright} 2017 IEEE.",

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AU - Zeng, Yunjia

AU - Chen, Zhi Ning

AU - Qing, Xianming

AU - Jin, Jian Ming

PY - 2017/4

Y1 - 2017/4

N2 - A zero-phase-shift line (ZPSL) grid-loop antenna backed by an artificial magnetic conductor (AMC) is proposed to realize a uniform and strong magnetic field distribution over an electrically large interrogation zone for near-field wireless systems. The grid-loop configuration is able to achieve a uniform magnetic field distribution over an enlarged interrogation zone by enhancing the magnetic field in the central portion of the ZPSL loop. Moreover, an AMC comprised of four-arm spiral unit cells is designed to back the ZPSL grid-loop antenna for a directional field distribution and enhanced magnetic field intensity. The proposed antenna is exemplified as a reader antenna for ultrahigh frequency near-field radio frequency identification systems. By using an Impinj Speedway reader with an output power of 30 dBm, a 100% detection rate of Impinj J41 tags is achieved up to 90 mm over an interrogation zone of 200 × 200 mm2.

AB - A zero-phase-shift line (ZPSL) grid-loop antenna backed by an artificial magnetic conductor (AMC) is proposed to realize a uniform and strong magnetic field distribution over an electrically large interrogation zone for near-field wireless systems. The grid-loop configuration is able to achieve a uniform magnetic field distribution over an enlarged interrogation zone by enhancing the magnetic field in the central portion of the ZPSL loop. Moreover, an AMC comprised of four-arm spiral unit cells is designed to back the ZPSL grid-loop antenna for a directional field distribution and enhanced magnetic field intensity. The proposed antenna is exemplified as a reader antenna for ultrahigh frequency near-field radio frequency identification systems. By using an Impinj Speedway reader with an output power of 30 dBm, a 100% detection rate of Impinj J41 tags is achieved up to 90 mm over an interrogation zone of 200 × 200 mm2.

KW - Artificial magnetic conductor (AMC)

KW - grid loop

KW - loop antenna

KW - near-field antenna

KW - radio frequency identification (RFID)

KW - ultrahigh frequency (UHF)

KW - zero-phase-shift line (ZPSL)

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An Artificial Magnetic Conductor Backed Electrically Large Zero-Phase-Shift Line Grid-Loop Near-Field Antenna

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